Shadow

Demons whom have grown resitant to devil arms. By covering themselves in dark magic that they can manipulate into a variety of forms they are able to repel devil arms but they are unable to withstand fire arms. Attack with your guns until the dark magic dispereces revealing their core. Once that shows up attack it until it glows red. Eventually the dark magic will return but the enemy will be unstable and attempt to force themselves into Dante and explode within. Just keep dodging until they begin to slow down and watch them explode.